Issued Patents All Time
Showing 101–102 of 102 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4695633 | Chromogenic 4,4-diaryl-dihydroquinazolones, their preparation and their use | Alfred Brack | 1987-09-22 |
| 4426530 | Triazolylcoumarin compounds, and their preparation and use as optical brighteners, scintillators and laser dyestuffs | Roderich Raue | 1984-01-17 |